Fakecloud is a local AWS cloud emulator designed for integration tests, allowing developers to run their applications with normal AWS clients while staying fully local. It supports 105 AWS services and 7,508 operations, with 100% conformance to Smithy variants. Fakecloud provides a realistic AWS environment without the need for an account, auth token, or paid plan, and includes first-party test clients in multiple programming languages, enabling developers to test their applications' actual behavior and verify effects without relying on mocks or test hooks.